Fig. 3.
A Correlation of the NfL levels and sensory nerve action potential (SNAP) of the sural nerve OT group (Spearman correlation: r = − 0.38; p = 0.04; N = 33), B Correlation of the NfL levels and sensory nerve action potential (SNAP) of the sural nerve PT group, C Correlation of the NfL levels and compound muscle action potential (CMAP) after distal nerve stimulation of the tibial nerve OT group (Spearman correlation: r = − 0.33; p = 0.06; N = 33), D Correlation of the NfL levels and cumulative muscle action potential (CMAP) after distal nerve stimulation of the tibial nerve PT group